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https://github.com/gsi-upm/soil
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af9a392a93
All tests pass but some features are still missing/unclear: - Mesa agents do not have a `state`, so their "metrics" don't get stored. I will probably refactor this to remove some magic in this regard. This should get rid of the `_state` dictionary and the setitem/getitem magic. - Simulation is still different from a runner. So far only Agent and Environment/Model have been updated.
88 lines
2.2 KiB
Python
88 lines
2.2 KiB
Python
from mesa.time import BaseScheduler
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from queue import Empty
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from heapq import heappush, heappop
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import math
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from .utils import logger
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from mesa import Agent
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class When:
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def __init__(self, time):
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self._time = float(time)
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def abs(self, time):
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return self._time
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class Delta:
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def __init__(self, delta):
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self._delta = delta
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def __eq__(self, other):
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return self._delta == other._delta
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def abs(self, time):
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return time + self._delta
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class TimedActivation(BaseScheduler):
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"""A scheduler which activates each agent when the agent requests.
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In each activation, each agent will update its 'next_time'.
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"""
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def __init__(self, *args, **kwargs):
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super().__init__(self)
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self._queue = []
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self.next_time = 0
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def add(self, agent: Agent):
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if agent.unique_id not in self._agents:
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heappush(self._queue, (self.time, agent.unique_id))
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super().add(agent)
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def step(self, until: float =float('inf')) -> None:
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"""
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Executes agents in order, one at a time. After each step,
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an agent will signal when it wants to be scheduled next.
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"""
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when = None
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agent_id = None
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unsched = []
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until = until or float('inf')
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if not self._queue:
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self.time = until
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self.next_time = float('inf')
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return
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(when, agent_id) = self._queue[0]
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if until and when > until:
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self.time = until
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self.next_time = when
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return
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self.time = when
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next_time = float("inf")
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while when == self.time:
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heappop(self._queue)
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logger.debug(f'Stepping agent {agent_id}')
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when = (self._agents[agent_id].step() or Delta(1)).abs(self.time)
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heappush(self._queue, (when, agent_id))
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if when < next_time:
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next_time = when
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if not self._queue or self._queue[0][0] > self.time:
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agent_id = None
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break
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else:
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(when, agent_id) = self._queue[0]
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if when and when < self.time:
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raise Exception("Invalid scheduling time")
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self.next_time = next_time
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self.steps += 1
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